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Re: Spark plugs
Well, even though I'm an AC Delco guy, I think I'm gonna try the NGK's. The more I think about it, the more it makes sense. It's the only plug they recommend, plus I'm sure they did their research on which plug works the best in this particular head. The NGK plug has a heat range of 4, while the AC (which I'm currently running) has a heat range of 3, theoretically making the NGK one step colder. I don't know if their scales are the same, but I guess I'll find out.
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-1967 Chevrolet Fleetside LWB- 350 V8 w/thumpr cam, NV3500, 3.08 gears, A/C, PS 
-1983 Chevy Silverado C1500- 383 stroker, TH400
-1989 Chevy Silverado K1500 SWB- 5.3L swap, 700R4, 3.42 gears
-And a '66 Ford Mustang- 200 I6, C4 trans, rust bucket
"The only thing we have to fear is fear itself." -FDR (and maybe rust too) 
You've gotta be able to stop and steer before you can go fast!
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